lammert - 1:46 am on Jan 8, 2011 (gmt 0)

Your setup is currently only loading the [addons], [base], [extras] and [updates] repositories.

Did you add an epel.repo file to /etc/yum.repos.d?
As far as I know, the minimum contents of that file should read:

[epel] name=Extra Packages for Enterprise Linux 5 - $basearch #baseurl=http://download.fedoraproject.org/pub/epel/5/$basearch mirrorlist=http://mirrors.fedoraproject.org/mirrorlist?repo=epel-5&arch=$basearch failovermethod=priority enabled=1 gpgcheck=1 gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL